Controlled annealing for enhanced structural stability and luminescence of sol-gel synthesized Gd2.37Y0.6Al5O12: Ce0.03 nanopowders

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-02-20 DOI:10.1007/s10971-025-06700-0

Karima Hammoum, Samir Hamrit, Allaoua Boukerika, Lydia Zaidi, Youssef Larbah, Djamel Eddine Kdib

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引用次数: 0

Abstract

In this study, we report the synthesis of cerium-doped gadolinium yttrium aluminum garnet powders with chemical formula Gd_2.37Y_0.6Al₅O₁₂:Ce_0.03 via the sol-gel method. The effect of annealing temperature on the stability of the garnet phase was thoroughly investigated. Various characterization techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL), were employed to assess these effects. XRD analysis demonstrated a marked improvement in the stability and crystallinity of the garnet phase with increasing annealing temperatures. FESEM images revealed the evolution of interconnected quasi-spherical particles, with a significant enlargement in average particle size correlating with higher annealing temperatures. PL spectra displayed a broad emission band attributable to Ce³⁺ transitions within the garnet matrix. Notably, the emission intensity exhibited a substantial enhancement with elevated annealing temperatures, which can be attributed to the increased crystallinity and a higher proportion of the garnet phase. These findings underscore the critical role of annealing temperature in optimizing the structural and luminescent properties of Gd_2.37Y_0.6Al₅O₁₂:Ce_0.03 nanopowders.

Graphical abstract

The effect of annealing temperature on the stability of the garnet Gd_2.37Y_0.6Al₅O₁₂:Ce_0.03 and luminescence, structural, morphological properties.

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控制退火提高溶胶-凝胶合成Gd2.37Y0.6Al5O12: Ce0.03纳米粉体的结构稳定性和发光性能

本研究采用溶胶-凝胶法制备了化学式为Gd2.37Y0.6Al5O12:Ce0.03的掺铈钆钇铝石榴石粉体。研究了退火温度对石榴石相稳定性的影响。采用各种表征技术，包括x射线衍射（XRD），傅里叶变换红外光谱（FTIR），场发射扫描电子显微镜（FESEM）和光致发光光谱（PL）来评估这些效果。XRD分析表明，随着退火温度的升高，石榴石相的稳定性和结晶度显著提高。FESEM图像显示了相互连接的准球形颗粒的演变，随着退火温度的升高，平均颗粒尺寸显着增大。PL光谱显示出较宽的发射带，这归因于Ce³+在石榴石基体内的跃迁。值得注意的是，随着退火温度的升高，发射强度显著增强，这可归因于结晶度的增加和石榴石相比例的增加。这些发现强调了退火温度对优化Gd2.37Y0.6Al5O12:Ce0.03纳米粉体结构和发光性能的关键作用。摘要研究了退火温度对石榴石Gd2.37Y0.6Al5O12:Ce0.03稳定性及发光、结构、形态等性能的影响。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.